A further update. DDNS feature appears to be broken now at the DDNS "service" now. DlinkDDNS is a "special" service provided by DynDNS.org. I tried to set up a DlinkDDNS account but it refused because I have a DynDNS.org account (this is how I found the "true" DDNS service company.) The DDNS client in my DIR-628 does not appear to update the entries at the DDNS "service." DynDNS.org is forcing their own Windows update client software.